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Sebastian Vizcarra, Porsche Meister Tech
Category: Porsche
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Experience: Porsche Factory Certified Master Technician
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Customer Question

Have 1987 Porsche 928 S4 with OE 245/45ZR16 rear sized tires on OE 16x8 rear wheels. Trouble finding OE size - told no longer making 245/45-16 in 45 aspect ratio. Dealers suggest 245/50-16. Is 50 aspect ratio Ok? Any cautions? What do you suggest? Optional tires suggested to change to 17" with






















Front Optional 17"



225/45-17



Rear Optional 17"



255/40-17


Would need to replace 16" rims and buy/put on 17" rims. Correct? What are the ramifications? Your thoughts?



Love car bought in '87. Thanks is not enough!!

Submitted: 12 months ago.
Category: Porsche
Expert:  Michelle-Mod replied 12 months ago.


Hi, I’m a moderator for this topic and I wonder whether you’re still waiting for an answer. If you are, please let me know and I will do my best to find a Professional to assist you right away. If not, feel free to let me know and I will cancel this question for you. Thank you!


Customer: replied 12 months ago.

Am I missing something? Followed link to my question and it read "Expert Replied" yet no answer given. Clicked "Reply to Expert" link to this page which reads "Your Expert needs more information - Tuesday, June 26, 2012 8:58 PM EST - From Michelle-Mod -
Hi, I’m a moderator for this topic and I wonder whether you’re still waiting for an answer. If you are, please let me know and I will do my best to find a Professional to assist you right away. - What happens next? Close


  1. Read your Expert's Information Request.
    Your Expert needs further information to be able to answer your question...."


What further information s needed? It doesn't say!


As question not answered I'll repeat and expand with more specificity:


-Have 1987 Porsche 928 S4 with OE 245/45ZR16 rear sized tires on OE 16x8 rear wheels. Trouble finding OE size - told no longer making 245/45-16 in 45 aspect ratio.


Dealers suggest replacing with 245/50-16 or same 225/50-16 size tire as currently on the front. Front rims with 225/50-16 tires are 16x7. Rear rims are16x8. Is 50 aspect ratio for rear 245/50-16 instead of 245/45-16 Ok? Any cautions? What do you suggest?


Others suggest replacing 245/45-16 rear tires with same 225/50-16 size used on front 7' rims on 8' rear rims? Your thoughts?


Optional tires suggested to change to 17" with using 225/45-17 on front and 255/40-17 on rear. Would need to replace 16" rims and buy/put on 17" rims. Correct? What are the ramifications? Your thoughts?

























Front Optional 17"





225/45-17





Rear Optional 17"


Expert:  Walt-mod replied 12 months ago.

Thank you for your patience, your business is very important to us, we are waiting on the Professional with the right expertise to come online. Feel free to let us know if you would like us to continue searching for an Professional or if you would like us to close your question. Thank you for your understanding!

Customer: replied 12 months ago.

Question asked Tuesday, June 26, 2012 7:22 AM EST and remains unanswered after almost 8 days. Close the question and refund $1.00 deposit and any other sum charged to CC. Dissatisfied 100% with service.

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